Fuel-mixing device



w. D. HOWARD. FUEL MIXING DEVICE.

APPLKIATION FILED MAY3I. 1918.

1 ,41 3 ,227. Patented Apr. 18,1922.

, //v VENTOR UNITED STATES PATENT oF ica.

WILLIAM DAVIS MERRY HOWARD, foF BosToN, MASSACHUSETTS.

FUEL-MIXING n vIoE.

Specification of Letters Patent. Patented A 18 1922 Application filed. May 31, 1913. Serial-No. 237,558.

This invention has for its object to pro-f videa novel mixing device adapted to be used with internal combustionenginesfor the purpose of securing a more perfect mixture of the'explosive charge before it is delivered to the intake manifold. My im-] proved mixing device is constructed not only to improve the mixture,.but also to heat the latter thereby providing an explosive charge which is in the best condition for securing most efficient results in the engine.

My improved mixing device is especially useful and effective in vaporlzingand gasifying heavy-orlight grade petroleum oils or alcohol or other fuel oil which cannot be'suc-.

cessfully used; with the ordinary carbureter.

.My improved mixing device comprises a casing having a heating chamber therein through which the heated products of combustion from the engine pass and a system of ducts or passages'extending through the heating chamber and through which the fuel charge passes on its way from the carbureter to the-intake manifold of the/engine, such ducts or passages being so arranged that the fuel charge will pass through the heating,

chamber aplurality of times and will thus become thoroughly heated. These ducts or passages are also constructed so as to secure a-t'horough mixing of the fuel charge in its pasage therethrou'gh.

In order to give an understanding of my invention, I have illustrated in the drawings A a selected embodiment thereof which will now be described, after which the novel features will be pointed out in the appended claims.

In the, drawings, Fig.1 a longitudinal section of my invention, the cover being re; moved;

Fig. 2 1s a longitudinal section: when the device is turned half way around from the view shown in Fig. 1; i Fig. 3 isa plan view of the body portion;

Fig. 4 is a sectional view of the body taken on the line-4 Fig.2; I

. Fig-5 is a sectional view of the body taken on the 'line55, Fig. 1;

. Fig. 6 is'a plan view-of the under side of the body showing the'fla'nge formed integral therewith;

, Fig. 7 is a sectional view of the cover;

Fig. Sis a section of the cover turned half aroundfrom the view shown in Fig. 7.

i Fig. 9 is a top view of the cover;

Fig. 10 is a bottom view of the cover shown in section in igs. 7 and 8. 4

My device comprises a cylindrical casing 1 having an internal heating chamber 13 and having two laterally-extending projections 7 and 8 which provide inlet and outlet passages 14 and 15 leading to the heating chamber 13. These hollow projections? and 8 arexadapted tobe connected to the exhaust manifold in such a way that the exhaust gases from the engine will'enter the inlet 14, pass through the chamber 13 and be discharged throu'gh the outlet opening 15.

.iThe casing l is provided at its lower end with atfiange 2 which is adapted to be connected to the usual carbureter, said flange having tapped holes 30 to receive the screws orbolts by which the device is connected to the carbureter. The casing 1 is formed with a body portion and witha cover portion 4 which is screw-threaded to the body, said bodyhaving the upwardly-extending flange or rim-6 provided withthe interior screw-' threads 5 to which the cover is screwed. The cover is provided with tapped apertures 30 toxreceive bolts'or screws by which the device is attached to the intake manifold of the engine. I The body is provided with a central passage 12 extending through the chamber 13,said passage being bounded by the tubular wall 11 and opening at its lower end through the bottom of the casing, said casing- 12 having communication, therefore, directly with'the carburetor.

The cover 4-15 provided with an outlet opening 23 which communicates with the in- I take manifold and the device is provided with'a plurality :of Ipassagesor ducts which form acommunication' between the casing 12 and the outlet 23 and through which the" fuelfchargeis passing, these passages mak ing a circuitous route for the fuel charge.

through th heating chamber 13.

The 1 cover eis formed with a chamber'26 which communicates with the upper end of the passage 12, and the casing is also provided with a plurality of passages indicated at 17, 18, 1-9'and which extend through the chamber 13 and are situated exterior to the central passage 12. These passages 17, 18, 19, 20 are enclosed by curved walls 1 21 and they all communicate at their lower end with an annular space 16 in the bottom of the casing which surrounds the tubular Two of thepassages or ducts, to

wall 11. wit: the passages 17 and 19, communicate at their upper end with the space 26, and the other two passages, to wit: the passages 18 and. 20, communicate at their upper end with passages or ducts in the cover. a which lead to a chamber 24 in said cover,

said chamber communicating with the outlet 23. When the cover and body are assembled, there will, therefore,exist a continuous but circuitous passage through the device for the fuel charge, this passage consisting of the passage 12, chamber 26, ducts" charge.

r I have also shown a jet nozzle 32 which communicates with the heating chamber 13 and opens into the passage 12. Some of the' products. of combustionwill be deliveredthrough this iet nozzle into the passage 12 and will thereby assist in securing a more perfect mixture byincreasing the agitation of said mixture. i 1

\Vhen the device is in use, the suction created in the intake manifold by the opera tion of the engine will draw the fuel charge from the carburetor through the circuitous passage above described, and in passing through this circuitous passage the fuel charge becomes thoroughly mixed. As soon as the engine starts the hot products of combustion will pass through the heating chamber 13, and thus heat thecharge. As a result of this operation an explosive mixture is produced which will give maximum efficiency and will burn without the formation of carbon residue. Moreover, the construction of the device is such that the fuel 'mixture is brought into intimate contact witha maximum area of heating and mixing surfaces in a minimum space.

I may, if desired, employ a cyllndrical platinum screen mounted inthe chamber 16, r

the presence of which serves to more effectively mix the fuel and to condition the fuel mixture which passestherethrough so as to provide a gas which will ignite and explode more easily under conditions of temperature and compression met with in theordinary gas engine. g

I claim: J v r 1. In a device of the class described,a cas ing comprising a body sectionhaving aheating chamber provided with an inlet and an outlet, whereby hot products of combustion may pass through saidchamber, said body sectionalso having a central passage which extends therethrough and an inlet for a gaseous mixture leading tosaid central passage, said body section further having two sets of connected intermediate passages extending through. he heating chamber, and a cover section having an outlet for said gaseous mixture, a space connecting certain ofsaid intermediate passages to said outlet, and a chamber which communicates both with the other intermediate passages and with the central passage.

2. In a device of the class described, a casing comprising a'body section having a heat-- ing chamber therein, provided with an inlet and an outlet whereby hot productsof combustion may pass through said chamber,

space connecting the central passage with the other intermediate passages.

In a device of the class described, a caspassages leading to an inlet, and a cover section secured to the bodysection and having an outlet, a passage connecting said outlet with certain of said passagesand a space forming a communication between the other passages.

In testimony whereof I have afiixedmy signature, in presence oftwo' witnesses;

VVitness'es': J '7 BEAUFOY H. Fox, VIKING R. H LM' RENQ i WILLIAM DAVIS MERRY EDWARD. 

